Calculating-machine.



A. HANTSCH.

CALCULATING MACHINE.

APPLICATION FILED 11017.6, 1913.

2 sums-sum 1 invamtoz I M% Patented July 14, 1914.

A. HANTSOH.

CALCULATING MACHINE.

APPLICATION FILED NOV. 6, 1913.

Patented July 14,1914.

2 SHEETS-SHEET 2.

I M g nuentoz ARTHUR HAN'I'SGI- I, F LINDEN, NEW JERSEY.-

GALCUIATING-MAGHINE.

Specification of Letters Patent.

Application filed November 6, 1913. Serial No. 799,446.

Patented July a, 1914.

To all whom it may concern:

Be 1t known that I, ARTHUR HAN'rsoH, a citizen of the German Emplre, and a resident of- Linden, Union county, New Jersey,

have invented certain new and useful In provements in Calculating-Machines, of"

1 which the following is a specification.

This invention relates to improvementsin calculating machines of the type disclosed in British Patent Number 13504 of 1851 and has more particularly reference to the so-called setting-up mechanism and the mechanism for operating the tens wheels which carry over the calculation from feed drum to feed drum after having been set up The object of my invention is to provide means whereby the tens wheels may be positioned by the depression of keys, instead of operating the tens wheels by means of finger slides as is now common in the art and dis closed in my application for patent filed July 31, 1912, Serial Number 712,427.

My invention is embodied in a key operated setting up mechanism as hereinafter described in detail and as illustrated in the accompanying drawings in which- Figure 1 is a side View of a calculating machine, the casing being broken away and parts being in section to clearly illustrate the keys and the parts adj acent thereto. Fig. 2 is a plan view of a portion of the machine parts being broken away to illustratethe mechanism more clearly, and Fig. 3 is a detail View transversely of the key board and illustrating the key, the actuating wheels and the key locking means.

The operation of setting up consists in placing a tens wheel in a given position dc:

v termined by the cipher which is to be used in a given calculation. If for instance the calculation to be executed is 7893X37 5, the ciphers 7, 8, 9 and 3 must be set up in their respective columns. To this end the four first tens wheels aremoved into positions to engage the third, ninth, eighth and seventh tooth of the first, second,third and fourth feed drum respectively and which is well known in the art. Heretofore the wheels have been moved by means of properly numbered finger slides. This is however, a slow and somewhat uncertain means for operating the wheels, and only one wheel" can be moved at each operation. This invention aims to move the wheels by depressing properly numbered keys. As an example, Fig.1 illustrates a tens wheel moved into position nine by depression of the key numbered nine in the tens column in the above example.

'In the drawings the casing of the machine is numbered 1.

5 is the slide rule. 6 represents a feed drum and 7 wheel on the squared shaft 8.

Inasmuch as the setting up mechanism isthe same for each tens wheel, only one need be described. The mechanism comprises athe tens member for moving the tens wheel, nine keys and operating means between the latter andthe said membe'rtogether with auxiliary means to insure accurate operation of any given tens wheel. The member formoving the wheel is in this instance in the form of a sliding rack 9 having a nose 10 which engages the'tens wheel. The rack is supported in asuiiicient number of cradles 11 and slides through an aperture 12 in the transverse supporting wall or partition 13.

The keys are arranged in rows of nine for each tens wheel as clearly shown in Fig. 2. The depression of any one key in a row actuates the slide rack-9 and operates the tens wheel. Each key-1 1 is guided'vertt cally by passing through three i horizontal plates of which 15 is the cover plate, while l6'and 17 are supporting plates for other parts as will be explained later. Each key is provided with afrack 18. I

19 and 20 are bearing cleats secured to the plate 16. There are two cleats for each row ofkeys. 21 are short shafts'or pins 'supported'in the cleats 19 and'20. Each shaft 21- carries a pinion 22, whichmesheswith; the key rack 1 8,-and a gear23' adapted tomesh with the slide rack 9.- The. gears 23 have a graded number of teeth so that when a particular key is depressed, the slide rack 9, through the instrumental'ity of the pinion 22 and the gear 23, is moved a predetermined distance rearward or to the right to properly position the tens wheel. In the drawing the gears 23 are shown as having the number of their teeth graded from one to nine, but they might of course equally well be graded otherwise so long as the gradation is such, that when a particular key is depressed, the slide rack is moved suifi-I ciently to place the tens wheel in the proper position corresponding to the number on the key. The ends of the key rack 18 act as stops between the plates and 17.

For each slide rack 9 there is a pawl which is pivoted at 26 and kept in engagement with the rack by a spring 27 securedto the left in Fig. 1 and whereby the gear 23 and pinion 22 are rotated and which force the keys upward into normal position.

30 is a spring coiled around the hub of the gear 23 and which acts to rotate the gears leftwardly into normal position and which also serves to raise the keys as will be understood.

Means are provided for preventing the operation of another key in the row, so long as one key is depressed. To this end there is provided under each row of keys a trough 31 secured to the plate 17. Each trough is filled with a suitable number of locking rings 32 so arranged that when a key is depressed, thelocking rings will move aside land permit the passage of the key, but will not permit the passage of another key. Instead the locking rings will engage the lower end of the keys and keep them locked in the upper or normalposition. It will be noted from Fig. 1 that after key number 'nine has been depressed the locking rings prevent the passage of any other key in the row. If awrong key has been depressed, the error is corrected by depressing the pawl finger 28 which releases the pawl 25 and the spring 27 pulls the slide 9 back, after which another key may be depressed. If it is desired to return all the depressed keys to normal position, the shaft 35 is rocked by' means of a finger 36 to simultaneously release all the pawls 25 by reason of the fact that the shaft 35 is eccentric with respect to the fingers 28 which abut said shaft. A spring or other means notshown may be used to pull the finger 36 upward.

It will be understood that the keys in each row are numbered from one to nine and that the rows of keys are arranged in a keyboard. Itwill be apparent from the foregoing that it is a very simple matter to operate that'an expert operator may easily set up several keys at one time with one depressing motion of the fingers. Also, that errors are guarded against as only one key in each row can be depressed at one time, but on the the advantage ofnot obstructing the return or upward movement of the depressed key.

The plates 16 and 17 will preferably be made in strips, suitably supported in the wall 13 and on transverse braces as shown, and whereby the machine may be easily repaired and inspected.

The invention is susceptible of changes in the detailed construction and I do not wish to be limited to the exact details'illustrated or described beyond the scope of the appended claims.

I claim 1 In a calculating machine the combination witha feed drum and'a tens wheel, aslidable rack in operative engagement with the said tens wheel, a depressible key, a

mutilated gear adapted to engage the said rack and means for operating the said mutilated gear to move the said rack a predetermined distance upon depression of the said key.

2. In a calculating machine the combination with a feed drum and a tens wheel, a slidable rack in operative engagement with the said tens wheel, a depressible key, a mutilated gear adapted to engage the said rack means for operatingthe said mutilated gear to move the said rack a predetermined distance upon depression of the said ke and means for automatically locking the said rack in position after it has been moved.

3. In a calculating machine the combination with a feed drum. and atens wheel, a slidable rack in operative engagement with the said tens wheel, a depressible key, a mutilated gear adapted to engage the said rack, means for operating the said mutilated gear to move the said rack a predetermined distance upon depression of the said key, means for automatically locking the said rack in positionafter it has been moved, and means for unlocking the said rack to restore the parts to their normal position.

4. In a calculating machine the combination with a feed drum and a tens wheel, a

slidable rack in operative engagement with the said tens wheel, a row of numbered depressible keys, a mutilated gear adjacent each key and adapted to engage the said rack to move the same a distance indicated by the numbers on the keys and means for operating one of the said mutilated gears upon depression of the key adjacent the same. the settlng up mechanism from the keys and 5. In a calculating machine the combination with a feed drum and a tens wheel, a slidable rack in operative engagement with the said tens wheel, a row of numbered depressible keys, 2. mutilated gear adjacent each key and adapted to engage the said rack to move the same a distance indicated by the numbers on the keys, means for operating one of the said mutilated gears upon .depression of the key adjacent the same, and

means for preventing operation of any other key in the row of keys when the said one key has been depressed.

6. In a calculating machine the combination with a feed drum and a tens wheel, a slidably mounted rack, in o erative engagement with the said tens w eel, a plurality;

of numbered depressible keys, a mutilated gear adjacent each key and adapted to engage the said rack, the number of teeth on said mutilated gears being equal to the num- 

